docs: Add roles page under Account & Privacy section (#51413)

Add new page detailing the roles available for users in their
organizations.

Release Notes:

- N/A *or* Added/Fixed/Improved ...

docs/src/SUMMARY.md

@@ -183,6 +183,7 @@
 # Account & Privacy
 
 - [Authenticate](./authentication.md)
+- [Roles](./roles.md)
 - [Privacy and Security](./ai/privacy-and-security.md)
   - [Worktree Trust](./worktree-trust.md)
   - [AI Improvement](./ai/ai-improvement.md)

docs/src/roles.md

@@ -0,0 +1,71 @@
+---
+title: Roles - Zed
+description: Understand Zed's organization roles and what each role can access, manage, and configure.
+---
+
+# Roles
+
+Every member of a Zed organization is assigned a role that determines
+what they can access and configure.
+
+## Role Types {#roles}
+
+Every member of an organization is assigned one of three roles:
+
+| Role       | Description                                            |
+| ---------- | ------------------------------------------------------ |
+| **Owner**  | Full control, including billing and ownership transfer |
+| **Admin**  | Full control, except billing                           |
+| **Member** | Standard access, no privileged actions                 |
+
+### Owner {#role-owner}
+
+An owner has full control over the organization, including:
+
+- Invite and remove members
+- Assign and change member roles
+- Manage billing, payment methods, and invoices
+- Configure data-sharing policies
+- Disable Zed's collaborative features
+- Control whether members can use Zed-hosted models and Zed's edit predictions
+- Transfer ownership to another member
+
+### Admin {#role-admin}
+
+Admins have the same capabilities as the Owner, except they cannot:
+
+- Access or modify billing settings
+- Transfer organization ownership
+
+This role is suited for team leads or managers who handle day-to-day
+member access without needing visibility into payment details.
+
+### Member {#role-member}
+
+Members have standard access to Zed. They cannot access billing or
+organization settings.
+
+## Managing User Roles {#managing-users}
+
+Owners and Admins can manage organization members from the Zed
+dashboard within the Members page.
+
+### Inviting Members {#inviting-members}
+
+1. On the Members page, select **+ Invite Member**.
+2. Enter the member's company email address and choose a role.
+3. The invitee receives an email with instructions to join. After
+   accepting, they authenticate via GitHub.
+
+### Changing a Member's Role {#changing-roles}
+
+1. On the Members page, find the member. You can filter by role or
+   search by name.
+2. Open the three-dot menu and select a new role.
+
+### Removing a Member {#removing-members}
+
+1. On the Members page, find the member.
+2. Select **Remove** and confirm.
+
+Removing a member removes their access to organization settings and any organization-managed features. They can continue using Zed on their own.